There are two other possible reasons for no-fill symptoms on a washer.
Less common is a problem with the ATC (automatic temp control), which
alternates hot and cold to give a more assured temp. This isn't too
common of a problem, but it is possible.

And, folks, here is an up to the minute heads up for something that is
showing up more and more in the field: problems with new-style metalic
braded hoses that have built-in burst protectors at the faucet end of
the hoses. The manufacture has put in a device to stop water flow in
case of burst, but they are shutting off water in normal operation. Ok
all you belt and suspender homeowners, who have 10 different systems in
your wash room to save you from water on the floor, can you suffer
through getting regular hoses? Metal is enough, you don't need this
extra device.